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Sometimes a successful design is a matter of being in the right place at the right time. The DHC-6 Twin Otter was designed as a floatplane, but with fixed landing gear it happened to meet the FAA commuter airplane definition of having a maximum takeoff gross weight under 12,500 lb and carried 19 passengers. It was sturdy and reliable with PT-6 engines, and was popular with commuter airlines. It has a maximum wing loading of only 30 lb/sq. ft and the ride can be uncomfortable on a hot day. The type certificate has been purchased by Viking Air in Vancouver, BC. First flight of the Series 400 aircraft was on Feb 19, 2010.

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